Publication PBRKB.Rev03EN
© RKB Europe SA 2016
Every care has been taken to ensure the accuracy of the information in the present document but no liability can be accepted for any errors, omissions, losses and damages (direct, indirect, consequential).
Reproduction in whole or in part without our authorization is prohibited.
The Swiss premium class bearing manufacturerThe RKB Bearing Industries Group is the Swiss manufacturing organization which has been operating in the bearing industry since 1936, with a monthly production capacity exceeding 350 tons of machined steel.The experience gained over the years provides RKB with the know-how and expertise necessary for the development and manufacture of technological industrial bearings up to 1925 mm outer diameter.RKB offers reliable cost-effective solutions, with extreme operational flexibility, leading-edge service, huge stock availability, short delivery time and the typical quality of a consistent premium-class bearing source. With a worldwide distribution network and exports to more than 50 countries, RKB is globally recognized as “The AlternativePower” in the bearing industry.
ACBB
SRB
CRB
TRB
TB
Table of contents
Angular contact ball bearings
• MAIN DESIGNS• SPECIAL DESIGNS
Spherical roller bearings
Cylindrical roller bearings• SINGLE ROW• DOUBLE ROW• MULTI ROW
Tapered roller bearings• SINGLE ROW• DOUBLE ROW• FOUR-ROW
Thrust bearings• SINGLE ROW• DOUBLE ROW
DGBBDeep groove ball bearings
Product TableProduct Table
Deep groove ball bearings
RKB offers a wide range of deep grove ball bearings (DGBBs) in single row design (open, sealed or shielded), with proven performance in many industrial fi elds. Having optimized internal geometry, they can operate at high speeds, sustaining radial and axial loads in both directions and generating low friction.
RKB DGBBs are engineered to successfully respond to the most demanding application requirements, in terms of high speeds, heavy loads and low noise.
This is mainly due to the use of the best raw materials and manufacturing technology, that permit to deliver only premium deep groove ball bearings.
RKB ball bearings
The ball bearings (BBs) manufactured by RKB come in many designs, dimensions and series. They are conceived to withstand combined loads and high speeds, covering most requirements in a number of standard and special industrial applications. All RKB BBs are made from high quality materials and special heat treatments for superior performance.Available in single and double row confi guration, in open or sealed version, they are low-maintenance, which makes them an irreplaceable cost-effective solution in many cases.For large size BBs, RKB can also apply Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) on rings and balls. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
DEEP GROOVE BALL BEARINGS
One-piece inner and outer ring
High strength two-piece pressed steel cage guided on balls (J)
Execution suitable for high operating speeds
Available with snap ring groove in outer ring for axial location (N)
BAINITE HT STABILIZATION
One-piece inner and outer ring
Moulded glass fi ber reinforced polyamide snap-in cage guided on balls (TN)
Execution suitable for very high accelerations and operating speeds
TN type
REINFORCEDBAINITE HT STABILIZATION
ZZ typeZZ typeOne-piece inner and outer ring
High strength two-piece pressed steel cage guided on balls (J)
Two non-contacting steel shields at both sides (ZZ)
Supplied already fi lled with grease for maintenance free operations
Shielded type to keep the grease inside the bearing without compromising the limiting speed
OPTIMIZEDBAINITE HT STABILIZATION
2RS type2RS typeOne-piece inner and outer ring
High strength two-piece pressed steel cage guided on balls (J)
Two contacting rubber seals at both sides (2RS)
Supplied already fi lled with grease for maintenance free operations
Sealed type to keep the grease inside the bearing and enhance contaminant exclusion
OPTIMIZEDBAINITE HT STABILIZATION
J typeOne-piece inner and outer ring
Two-piece machined brass cage guided on balls (M)
Execution suitable for very high operating speeds
Available with two-piece machined brass cage guided on inner ring (MB) or outer ring (MA)
Available with axial lubrication grooves in the cage (S)
Available with locating slot in outer ring for axial location (N1)
OPTIMIZEDBAINITE HT STABILIZATION
M type
Main designs
Angular contact ball bearings
The angular contact ball bearings (ACBBs) produced by RKB are used in a wide array of machines where combined loads, high speeds and runout accuracy are required. Available in single or double row confi guration, they can be manufactured with different types of cage (machined brass, pressed steel or polyamide) and dimensional precisions.
Single row ACBBs can be directly paired by RKB in face-to-face (DF) or back-to-back (DB) confi guration, depending on load conditions, presence of tilting moments and misalignment magnitude in the application.
RKB ball bearings
The ball bearings (BBs) manufactured by RKB come in many designs, dimensions and series. They are conceived to withstand combined loads and high speeds, covering most requirements in a number of standard and special industrial applications. All RKB BBs are made from high quality materials and special heat treatments for superior performance.Available in single and double row confi guration, in open or sealed version, they are low-maintenance, which makes them an irreplaceable cost-effective solution in many cases.For large size BBs, RKB can also apply Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) on rings and balls. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
ANGULAR CONTACT BALL BEARINGS
M type QJ typeOne-piece outer ring
Two-piece inner ring circumferentially split
One-piece machined brass cage guided on outer ring (MA)
Supports only axial loads
Two locating slots (N2)
Available also with one-piece inner ring and two-piece outer ring (Q)
One-piece inner and outer ring
One-piece machined brass cage guided on balls (M)
Available with machined brass cage guided on inner ring (MB)
Single non-universal bearing execution
Suitable for very high operating speeds
Available with 25°, 30° or 40° contact angle
BAINITE HT STABILIZATIONBAINITE HT STABILIZATION
DB type DF typeBack-to-back arrangement (DB) of two ACBBs
One-piece machined brass cage guided on balls (M)
Preset or adjusted BEP on customer’s request
Available with machined brass cage guided on inner ring (MB)
Available with inner and/or outer spacers featuring lubrication grooves and/or lubrication holes
Stiffer arrangement to withstand tilting moments
Face-to-face arrangement (DF) of two ACBBs
One-piece machined brass cage guided on balls (M)
Preset or adjusted BEP on customer’s request
Available with machined brass cage guided on inner ring (MB)
Available with inner and/or outer spacers featuring lubrication grooves and/or lubrication holes
OPTIMIZED BAINITE HT STABILIZATION OPTIMIZEDBAINITE HT STABILIZATION
DFM typeDouble row ACBB face-to-face arrangement (DF)
Non-separable open design
One-piece machined brass cage guided on inner ring (MB)
Lubrication grooves and holes in outer rings
Supports high combined loads
DB+ZZ typeDouble row ACBB back-to-back arrangement (DB)
Non-separable shielded design (ZZ)
Moulded glass fi ber reinforced polyamide snap-in cage guided on balls (TN)
Available with lubrication holes in the inner ring
Shielded type to keep the grease inside the bearing without compromising the limiting speed
Supports high combined loads
STABILIZATION REINFORCEDOPTIMIZEDBAINITE HT BAINITE HT STABILIZATION
Main designs
238 248 239 249230 240 231 241
222 232213 223 233
A complete range
The range of RKB spherical roller bearings covers most requirements of standard and special industrial applications, in severe and critical working conditions.
RKB offers a wide portfolio of open and sealed SRBs in all diameter and width series. While the narrow low-section bearings (e.g. 238 series) feature high speed capabilities as well as low weight and minimum space dimensions, the wide high-section bearings (e.g. 233 series) have higher load carrying capacities.
All RKB SRBs put together experience in design with proven performance in all major industries.
RKB spherical roller bearings
The spherical roller bearings (SRBs) manufactured by RKB are engineered to withstand high radial forces and moderate axial forces acting in both directions. RKB SRBs can dynamically accommodate misalignments due to shaft bending. They are produced with cylindrical or tapered bore, in open or sealed execution. Depending on application requirements, RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rollers. Moreover, as for dimensions, RKB spherical roller bearings are manufactured according to ISO/ABMA/GOST specifi cations. As a consequence, they are fully interchangeable with all the bearings that meet the relevant international standards.
SPHERICAL ROLLER BEARINGSMAIN DESIGNS
CA type CC typeDesign used for large size bearings, withstanding high radial loads and moderate axial loads in both directions
Inner ring with integral side ribs
Symmetrical roller profi le
One-piece double pronged machined brass or steel (CAF) cage with integral slinger guided on the inner ring
Lubrication groove and holes in the outer ring
Available with lubrication groove and three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)
Design used for medium size bearings operating at medium to high speeds and featuring high load carrying capacities
Ribless inner ring
Symmetrical or asymmetrical roller profi le
Two-piece window type pressed steel cage guided on the inner ring
Lubrication groove and holes in the outer ring
Available with lubrication groove and three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)
BAINITE HT STABILIZATION TOUGH ROLLER VICTORY LINEBAINITE HT STABILIZATION TOUGH ROLLER VICTORY LINE
ECA typeDesign used for large size bearings, based on CA design, with optimized roller set
Inner ring with integral side ribs
Symmetrical roller profi le
One-piece double pronged machined brass cage with separated slinger guided on the inner ring
Lubrication groove and holes in the outer ring
Available with lubrication groove and three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)
BAINITE HT STABILIZATION TOUGH ROLLERE-TYPEE-TYPE VICTORY LINE
MA type MB typeDesign used for medium and large size bearings
Inner ring with integral side ribs
Symmetrical roller profi le
Two-piece machined brass cage guided on the outer ring
Lubrication groove and holes in the outer ring
Optimized separable cage for better performance in case of different rolling element speed
Available with lubrication groove and three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)
Design used for medium size bearings operating at medium to high speeds, featuring high load carrying capacities
Inner ring with integral side and central ribs
Symmetrical or asymmetrical roller profi le
Two-piece machined brass cage guided on the inner ring
Lubrication groove and holes in the outer ring
Available with lubrication groove and three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)
BAINITE HT STABILIZATION TOUGH ROLLER VICTORY LINE BAINITE HT STABILIZATION TOUGH ROLLER VICTORY LINE
Main designs
Tailor made solutions
Besides the main spherical roller bearing designs, RKB has developed new solutions according to specifi c application requirements.
The special designs include SEALED SRBs, for smooth operation in contaminated environments, ROVSX type, expressly designed for vibratory equipment, WOR execution, suitable for gear output shaft of truck concrete mixers, and SPLIT bearings to make maintenance operations easier at hard-to-reach positions.
If duly applied, these special designs are cost effective for the customer, since they allow increased bearing life expectancy and reduced machine downtime.
RKB spherical roller bearings
The spherical roller bearings (SRBs) manufactured by RKB are engineered to withstand high radial forces and moderate axial forces acting in both directions. RKB SRBs can dynamically accommodate misalignments due to shaft bending. They are produced with cylindrical or tapered bore, in open or sealed execution. Depending on application requirements, RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rollers. Moreover, as for dimensions, RKB spherical roller bearings are manufactured according to ISO/ABMA/GOST specifi cations. As a consequence, they are fully interchangeable with all the bearings that meet the relevant international standards.
SPHERICAL ROLLER BEARINGSSPECIAL DESIGNS
Special designs
ECCS typeDesign used for small to medium size bearings
Ribless inner ring
Symmetrical roller profi le
Two-piece pressed steel window type cage with slotted open face to improve lubricant fl ow and separated slinger guided on the inner ring
Lubrication groove and six holes in the outer ring (W33X)
Suitable for harsh environments
Available with lubrication groove, three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)
BAINITE HT STABILIZATION TOUGH ROLLERE-TYPEE-TYPE VICTORY LINE
WOR type SPLIT typeDesign used for gear output shaft of truck concrete mixers
Inner ring with integral central rib
Symmetrical or asymmetrical roller profi le
Two-piece pressed steel window type cage guided on the inner ring
Wider outer ring (WOR) in one piece or split into two halves
Permissible misalignment greater than standard execution
Available with two-piece machined brass cage guided on the inner ring
Design used for medium and large size bearings
Wider inner ring with integral side ribs
Symmetrical roller profi le
Two-piece bolted double pronged machined brass cage guided on the inner ring
Engineered for hard-to-reach positions(e.g. bucket wheel excavators)
Design for facilitated mounting, dismounting and maintenance, and reduced machine downtime
BAINITE HT STABILIZATIONBAINITE HT STABILIZATIONOPTIMIZED
SEALED type ROVSX typeDesign used for medium and large size bearings operating at medium speeds
Inner ring with integral side ribs
Symmetrical roller profi le
One-piece double pronged machined brass cage with integral slinger guided on the inner ring
Integral rubber seals on both bearing sides for harsh working conditions (2CZ)
Lubrication groove and holes in the outer ring
Available with plugged lubrication holes in the outer ring (W77)
Available with two-piece window type pressed steel cage guided on the inner ring
Design used for vibratory equipment
Inner ring with integral side ribs
Symmetrical roller profi le
Two-piece machined brass cage guided on the outer ring
Radial internal clearance higher than normal CN
Running accuracy higher than standard execution
Available with lubrication groove, three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)
BAINITE HT STABILIZATION TOUGH ROLLER VICTORY LINE BAINITE HT STABILIZATION TOUGH ROLLER ROVSX
Single row cylindrical roller bearings
RKB offers a wide range of single row cylindrical roller bearing designs in normal or reinforced execution with increased performance in critical applications.
Roller and raceway profi les are designed to attain optimized stress distribution while minimizing the edge effect, especially under critical conditions.
The portfolio of RKB single row CRBs is fi nally enhanced by the high-capacity full complement bearings (cageless), which reach higher load carrying capacities within the same boundary dimensions.
RKB cylindrical roller bearings
The cylindrical roller bearings (CRBs) manufactured by RKB are produced in many designs, dimensions and series, to withstand heavy radial loads and medium speeds, covering most of the requirements in a variety of standard and special industrial applications. All CRBs manufactured by RKB offers the highest load rating capacities, improved internal geometry, high quality materials and special heat treatments for superior performance. RKB CRBs are available with cylindrical or tapered bore in single, double or multi row confi guration. Depending on application requirements, RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rollers. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
CYLINDRICAL ROLLER BEARINGSSINGLE ROW
Main designs
NU type N typeOuter ring with two integral side ribs
Ribless inner ring
Two-piece machined brass cage guided on rollers (M) or outer ring (MA)
Available with riveted or AVH cage also with lubrication grooves
Optimized raceway geometry and roller profi le
To be used in non-locating position
Ribless outer ring
Inner ring with two integral side ribs
Two-piece machined brass cage guided on rollers (M) or inner ring (MB)
Lubrication grooves in side faces of inner ring
Available with riveted or AVH cage also with lubrication grooves
Optimized raceway geometry and roller profi le
To be used in non-locating position
BAINITE HT STABILIZATION CAGE DESIGN VICTORY LINEPROFILE BAINITE HT STABILIZATION CAGE DESIGN VICTORY LINEPROFILE
NUP type NJ typeOuter ring with two integral side ribs
Inner ring with one integral side rib and one loose rib
Two-piece machined brass cage guided on rollers (M) or outer ring (MA)
Available with riveted or AVH cage also with lubrication grooves
Optimized raceway geometry and roller profi le
Can be used in locating position
Outer ring with two integral side ribs
Inner ring with one integral side rib
Two-piece machined brass cage guided on rollers (M) or outer ring (MA)
Available with riveted or AVH cage also with lubrication grooves
Optimized raceway geometry and roller profi le
Can be used in one direction locating position
BAINITE HT STABILIZATION CAGE DESIGN VICTORY LINEPROFILE BAINITE HT STABILIZATION CAGE DESIGN VICTORY LINEPROFILE
NJGL typeNJG typeOuter ring with two integral side ribs
Inner ring with one integral side rib
Full complement (cageless) separable design for increased carrying capacities
Reduced maximum rotational speed compared to caged design
Optimized raceway geometry and roller profi le
Can be used in one direction locating position
Outer ring circumferentially split
Inner ring with one integral side rib
Lamellar brass cage design
Designed to maintain high carrying capacities without compromising the rotational speed capability
Optimized raceway geometry and roller profi le
BAINITE HT STABILIZATION VICTORY LINEPROFILE BAINITE HT STABILIZATION VICTORY LINEPROFILE
NCF typeOuter ring with one integral side rib and retaining ring
Inner ring with two integral side ribs
Full complement (cageless) design for increased load carrying capacities
Reduced maximum rotational speed compared to caged design
Optimized raceway geometry and roller profi le
Can be used in one direction locating position
BAINITE HT STABILIZATION VICTORY LINEPROFILE
Double row cylindrical roller bearings
With a wide range of executions of double row cylindrical roller bearings (DRCRBs), RKB is able to fulfi ll any requirement in demanding applications such as large size gearboxes, machine tools, grinding mills and crushers.
To ensure superior performance, RKB double row cylindrical roller bearings are manufactured from high quality special steels, heat treated in optimized automatic lines.
With improved internal geometry and profi le, DRCRBs can withstand high radial loads within a narrow cross section.
RKB cylindrical roller bearings
The cylindrical roller bearings (CRBs) manufactured by RKB are produced in many designs, dimensions and series, to withstand heavy radial loads and medium speeds, covering most of the requirements in a variety of standard and special industrial applications. All CRBs manufactured by RKB offers the highest load rating capacities, improved internal geometry, high quality materials and special heat treatments for superior performance. RKB CRBs are available with cylindrical or tapered bore in single, double or multi row confi guration. Depending on application requirements, RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rollers. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
CYLINDRICAL ROLLER BEARINGSDOUBLE ROW
Main designs
NNU type NN typeOuter ring with three integral ribs
Ribless inner ring
One-piece double pronged machined brass or steel cage
Annular groove and lubrication holes in outer ring
Optimized raceway geometry and roller profi le
Available with cylindrical and tapered bore
Available with locating slots in outer ring, lubrication holes in inner ring, lubrication grooves in side faces of inner and outer rings
Available with steel pin type cage and pierced roller design
Ribless outer ring
Inner ring with three integral ribs
One-piece double pronged machined brass cage
Annular groove and lubrication holes in outer ring
Optimized raceway geometry and roller profi le
Available with tapered and cylindrical bore
Available with steel pin type cage and pierced roller design
BAINITE HT STABILIZATION VICTORY LINEPROFILEOPTIMIZED BAINITE HT STABILIZATIONOPTIMIZED VICTORY LINEPROFILE
SL04 (NNF) type SL18 (NNCF) typeOuter ring with one central integral rib
Split inner ring with three integral ribs, clamped with a retaining ring
Full complement (cageless) design for increased load carrying capacities
Reduced maximum rotational speed
Annular groove and lubrication holes in outer and inner ring
Optimized raceway geometry and roller profi le
Integrated rubber seals on both bearing sides to avoid contamination
Available fi lled with grease
Can be used in locating position
Outer ring with one integral side rib andretaining ring
Inner ring with three integral ribs
Full complement (cageless) design for increased load carrying capacities
Reduced maximum rotational speed compared to caged design
Optimized raceway geometry and roller profi le
Can be used in one direction locating position
Available with annular groove and lubrication holes in outer or inner ring
BAINITE HT STABILIZATIONOPTIMIZED PROFILE BAINITE HT STABILIZATIONOPTIMIZED PROFILE
SL01 (NNC-C) type SL02 (NNCL-C) typeSplit outer ring with two integral ribs, clamped with a retaining ring
Inner ring with three integral ribs
Full complement (cageless) design for increased load carrying capacities
Reduced maximum rotational speed compared to caged design
Annular groove and lubrication holes in outer ring
Optimized raceway geometry and roller profi le
Can be used in locating position
Ribless outer ring
Inner ring with three integral ribs
Full complement (cageless) design for increased load carrying capacities
Reduced maximum rotational speed compared to caged design
Annular groove and lubrication holes in outer ring
Separating ring between the two rows of rollers
Optimized raceway geometry and roller profi le
Can be used in locating position
BAINITE HT STABILIZATION PROFILEOPTIMIZED BAINITE HT STABILIZATIONOPTIMIZED PROFILE
Multi row cylindrical roller bearings
Multi row cylindrical roller bearings, also known as MULTIROLL, are made up of two parts: inner ring (L) and outer assembly (R), which includes outer rings, cage and four rows of rollers.
They are mainly used in rolling mill stands, where they are subjected to very high radial loads and impacts combined with medium-low speeds.
RKB MULTIROLL bearings are manufactured in different executions, to suit a wide range of applications and environments, above all in the harsh conditions of the steel and aluminum industry.
RKB cylindrical roller bearings
The cylindrical roller bearings (CRBs) manufactured by RKB are produced in many designs, dimensions and series, to withstand heavy radial loads and medium speeds, covering most of the requirements in a variety of standard and special industrial applications. All CRBs manufactured by RKB offers the highest load rating capacities, improved internal geometry, high quality materials and special heat treatments for superior performance. RKB CRBs are available with cylindrical or tapered bore in single, double or multi row confi guration. Depending on application requirements, RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rollers. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
CYLINDRICAL ROLLER BEARINGSMULTI ROW
Main designs
F2CII/EVO type D2CII typeDesign used for large size bearings
Two-piece ribless inner ring with lubrication grooves in side faces
Two-piece outer ring with separated side fl anges and one central spacer
Two-piece pin type steel cage with lightened design for optimized lubrication
Pierced rollers design for increased carrying capacities
Available with two-piece window type riveted machined brass cage (EVO)
Design used for medium and large size bearings
Two-piece ribless inner ring with lubrication grooves in side faces
Two-piece outer ring with separated side fl anges and one central spacer
Double pronged machined brass cage
Annular groove and lubrication holes in outer ring
Design for facilitated mounting and dismounting
BAINITE HT STABILIZATION PROFILE BAINITE HT STABILIZATION PROFILE
Q2ACEVO typeDesign used for large size bearings with increased shoulder on inner ring for seal seating
Two-piece inner ring with lubrication grooves in side faces
Two-piece outer ring with separated side fl anges and one central spacer
Two-piece window type riveted machined brass cage
Annular groove and lubrication holes in outer ring
BAINITE HT STABILIZATION PROFILECAGE DESIGN
AF2D type GB2DX typeDesign used for small and medium size bearings
One-piece ribless inner ring
Two-piece outer ring with three integral ribs
Double pronged high strength machined steel cage for increased stiffness and resistance to corrosive environments
Annular groove and lubrication holes in outer ring
Available with lubrication grooves in rings side faces
Available with double pronged machined brass cage (A2D)
BAINITE HT STABILIZATION VICTORY LINEPROFILE BAINITE HT STABILIZATION VICTORY LINEPROFILECAGE DESIGN
Designed for rolling mill stands with automatic roll changing device
One-piece ribless inner ring with increased length of chamfers to facilitate mounting
Two-piece outer ring with integral ribs
Two-piece reinforced window type machined brass cage with integral rivets (AVH) for optimized roller drop
Long-short roller arrangement for better load distribution and reduced edge stress
Optimized for oil lubrication and automatic grease lubrication systems
Single row tapered roller bearings
RKB single row and matched pair tapered roller bearings (SRTRBs) are widely used in all industrial segments, in standard and critical applications.
The tighter dimensional tolerances, obtained through an extremely high precision manufacturing technology, and the optimized inner geometry (E-Type class) make of such bearings a reliable solution to improve the performance of any machine.
Naturally, the matched pairs can be assembled according to the customer’s special needs (e.g. a given axial internal clearance). The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
RKB tapered roller bearings
The tapered roller bearings (TRBs) manufactured by RKB are engineered to withstand combined radial and thrust loads. Available in a rich portfolio of designs and sizes, in standardized and non-standardized dimensional series, RKB tapered roller bearings can be in metric or inch measurements and represent the state of the art. Manufactured from high hardness materials, featuring unparalleled fatigue strength and resistance to wear, RKB TRBs provide excellent performance even under severe operating conditions. RKB’s single row, matched pair, double and four-row tapered roller bearings are optimized to ensure increased load carrying capacities and high stiffness in special applications. RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rollers.
TAPERED ROLLER BEARINGSSINGLE ROW
Main designs
TS typeRibless outer ring (cup)
Inner ring with two integral ribs (cone)
One-piece window type pressed steel cage
Supports radial and axial loads in one direction
Suitable for medium to high operating speeds
Separable design
Optimized geometry (E-Type)
Optimized roller profi le (ZB)
Available in metric and inch sizes
BAINITE HT STABILIZATION VICTORY LINEPROFILEE-TYPEE-TYPE
Diameter Series
Diameter Series
C C C C CD D D DE E E EB B
BCD
E
F
G
B B B
dDEInch Series
0
1
2
3
00
01
02
03
10
11
12
13
20
21
22
23
30
31
32
33
0 1 2 3Metric SeriesWidth Series
DB typeMatched set of single row TRBs (back-to-back arrangement)
Available with cup and cone spacers (plain or with lubrication holes)
Supports radial and axial loads in both directions
High arrangement stiffness
Reduced angular misalignment
Optimized geometry (E-Type)
Optimized roller profi le (ZB)
Preset or adjusted BEP on customer’s request
Available in metric and inch sizes
BAINITE HT STABILIZATION PROFILE
DF typeMatched set of single row TRBs (face-to-face arrangement)
Available with cup and cone spacers (plain or with lubrication holes)
Supports radial and axial loads in both directions
Low arrangement stiffness
Increased angular misalignment
Optimized geometry (E-Type)
Optimized roller profi le (ZB)
Preset or adjusted BEP on customer’s request
Available in metric and inch sizes
BAINITE HT STABILIZATION PROFILE
Double row tapered roller bearings
RKB double row tapered roller bearings (DRTRBs) are produced in several confi gurations (TDO, TDOS, TDI, TDIS) to support combined forces and locate the shaft in both directions.
Manufactured with a given axial clearance (BEP), DRTRBs can fully exploit their potential in a variety of industries and applications. In order to manufacture products with the highest possible resistance to fatigue and wear, RKB makes use of different bearing steel grades and special heat treatments. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
RKB tapered roller bearings
The tapered roller bearings (TRBs) manufactured by RKB are engineered to withstand combined radial and thrust loads. Available in a rich portfolio of designs and sizes, in standardized and non-standardized dimensional series, RKB tapered roller bearings can be in metric or inch measurements and represent the state of the art. Manufactured from high hardness materials, featuring unparalleled fatigue strength and resistance to wear, RKB TRBs provide excellent performance even under severe operating conditions. RKB’s single row, matched pair, double and four-row tapered roller bearings are optimized to ensure increased load carrying capacities and high stiffness in special applications. RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rollers.
TAPERED ROLLER BEARINGSDOUBLE ROW
Main designs
Two ribless outer rings (two single cups)
One inner ring with three ribs (one double cone)
Two one-piece window type pressed steel cages
Lateral seals for contaminant exclusion
Preset or adjusted BEP on customer’s request
Designed with increased contact angle
Suitable for high axial load carrying capacity
Available with one or more antirotation keyway slots on each side of double cone
Outer bush with annular groove and lubrication holes
Available in metric and inch sizes
TDISS type
BAINITE HT STABILIZATIONOPTIMIZED PROFILE
TDO type TDONASW typeOne ribless outer ring (one double cup)
Two inner rings with two ribs each (two single cones)
Two one-piece window type pressed steel cages
One single spacer between inner rings (plain or with lubrication grooves and holes)
Supports radial and axial loads in both directions
High arrangement stiffness
Reduced angular misalignment
Optimized roller profi le (ZB)
Preset or adjusted BEP on customer’s request
Available in metric and inch sizes
One ribless outer ring (one double cup)
Two inner rings with two ribs each (two single cones)
Two one-piece window type pressed steel cages
Lubrication grooves in cones internal side face
Lateral shields or seals for contaminant exclusion
Execution without spacer
Supports radial and axial loads in both directions
High arrangement stiffness
Optimized roller profi le (ZB)
Preset or adjusted BEP on customer’s request
Available in metric and inch sizes
BAINITE HT STABILIZATION PROFILEOPTIMIZED BAINITE HT STABILIZATIONOPTIMIZED PROFILE
TDIS typeTwo ribless outer rings (two single cups)
One inner ring with three ribs (one double cone)
Two one-piece window type pressed steel cages
Supports axial loads in both directions
Designed with increased contact angle
Suitable for high axial load carrying capacity
Available with steel pin type cage and pierced roller design
Available with one or more antirotation keyway slots on each side of double cone
Available in metric and inch sizes
TDI typeTwo ribless outer rings (two single cups)
One inner ring with three ribs (one double cone)
Two one-piece window type pressed steel cages
One single spacer between outer rings (plain or with lubrication grooves and holes)
Supports radial and axial loads in both directions
Optimized roller profi le (ZB)
Preset or adjusted BEP on customer’s request
Available in metric and inch sizes
BAINITE HT STABILIZATION PROFILEOPTIMIZED BAINITE HT STABILIZATIONOPTIMIZED PROFILE
Four-row tapered roller bearings
RKB four-row tapered roller bearings (FRTRB) are produced mainly in TQO and TQI confi guration, in open and sealed version.
Supplied with the required axial internal clearance (BEP), they are mainly employed on work rolls of rolling mill applications.
The use of high quality raw materials, special heat treatments, and innovative sealing solutions are at the base of their higher operating reliability and longer service life expectancy. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
RKB tapered roller bearings
The tapered roller bearings (TRBs) manufactured by RKB are engineered to withstand combined radial and thrust loads. Available in a rich portfolio of designs and sizes, in standardized and non-standardized dimensional series, RKB tapered roller bearings can be in metric or inch measurements and represent the state of the art. Manufactured from high hardness materials, featuring unparalleled fatigue strength and resistance to wear, RKB TRBs provide excellent performance even under severe operating conditions. RKB’s single row, matched pair, double and four-row tapered roller bearings are optimized to ensure increased load carrying capacities and high stiffness in special applications. RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rollers.
TAPERED ROLLER BEARINGSFOUR-ROW
TQIT typeTwo ribless outer rings (two double cup) plus one cup spacer (plain or with lubrication grooves and holes)
Three inner rings with side ribs (one double cone, two single cones)
Four one-piece window type steel cages
Preset or adjusted BEP on customer’s request
Available with helical groove in the bore (G)
Available with cylindrical (TQI) or tapered bore (TQIT)
Marked zones on cups side face to facilitate mounting and maintenance operations
Available in metric and inch sizes
BAINITE HT STABILIZATION PROFILE
TQO type TQO NO SPACER/G type
BAINITE HT STABILIZATION VICTORY LINEPROFILE BAINITE HT STABILIZATION VICTORY LINEPROFILE
Three ribless outer rings (one double cup, two single cups) plus two cup spacers (plain or with lubrication grooves and holes)
Two inner rings with three ribs (two double cones) plus one cone spacer (plain or with lubrication holes)
Four one-piece window type steel cages
Supports radial and axial loads in both directions
Preset or adjusted BEP on customer’s request
Available with helical groove in the bore (G)
Marked zones on cups side face to facilitate mounting and maintenance operations
Available in metric and inch sizes
Three ribless outer rings (one double cup, two single cups)
Two inner rings with three ribs (two double cones)
Four one-piece window type pressed steel cages
Supports radial and axial loads in both directions
Preset or adjusted BEP on customer’s request
Available with helical groove in the bore (G)
Lubrication grooves in double cone side faces
Marked zones on cups sides face to facilitate mounting and maintenance operations
Available in metric and inch sizes
TQO PIERCED/G type TQOS/AVS2/G type
BAINITE HT STABILIZATION PROFILE BAINITE HT STABILIZATION PROFILEREINFORCED OPTIMIZED
Three ribless outer rings (one double cup, two single cups) plus two cup spacers (plain or with lubrication grooves and holes)
Two inner rings with three ribs (two double cones)
Four one-piece window type steel cages
Preset or adjusted BEP on customer’s request
Marked zones on cups side face to facilitate mounting and maintenance operations
Lateral fl anges with lip seals and o-rings on bearing both sides
Designed with Anti-Vortex System cone spacer seal set
Available in metric and inch sizes
Three ribless outer rings (one double cup, two single cups) plus two cup spacers (plain or with lubrication grooves and holes)
Two inner rings with three ribs (two double cones) plus one cone spacer (plain or with lubrication holes)
Four two-piece steel pin type cages
Pierced roller execution to increase load capacity
Preset or adjusted BEP on customer’s request
Available with helical groove in the bore (G)
Marked zones on cups side face to facilitate mounting and maintenance operations
Available in metric and inch sizes
Main designs
Single direction thrust bearings
The broad portfolio of single direction thrust bearings (SDTBs) engineered and produced by RKB offers cost-effective solutions for the most demanding industries.
SDTBs can withstand only unidirectional axial loads, axially locating the shaft. Roller and raceway profi les are designed and manufactured to reduce stresses and minimize roller-edge effect.
Depending on machine requirements and operating conditions, they can be customized to enhance application performance in a reliable and effi cient way.
RKB thrust bearings
The thrust bearings (TBs) manufactured by RKB are designed to support high axial loads and, in some cases, even moderate radial loads. The manufacturing program includes single and double direction TBs with fl at or spherical housing locating washers to meet any requirements in various industrial applications. Thanks to the improved internal geometry and the use of the most suitable raw materials, all RKB TBs attain the highest axial load ratings and the best reliability.Depending on application requirements, RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rolling elements. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
SINGLE DIRECTION
THRUST BEARINGS
51M type EM typeFlat housing locating washer
Separable design
One-piece machined brass cage (M) guided on balls
Supports unidirectional axial loads
Available with sphered housing washer
Asymmetrical roller profi le
One-piece machined brass cage guided on shaft washer (M)
Reinforced and optimized execution (E)
Supports unidirectional axial loads and angular misalignment
BAINITE HT STABILIZATION REINFORCEDBAINITE HT STABILIZATION OPTIMIZED
81M typeFlat housing locating washer
Low cross section separable design
Two-piece machined brass cage (M) guided on rollers
Supports unidirectional axial loads
Available with sphered housing washer
89M typeFlat housing locating washer
Two rows of rollers
Two-piece machined brass cage (M) guided on rollers
Low cross section separable design
Supports unidirectional axial loads
BAINITE HT STABILIZATION PROFILE REINFORCEDBAINITE HT STABILIZATION PROFILE
EMEVO type EJ typeAsymmetrical roller profi le
High strength pressed steel cage (J) guided on shaft washer
Reinforced and optimized execution (E)
Supports unidirectional axial loads and angular misalignment
Asymmetrical roller profi le
One-piece EVO type machined brass cage guided on shaft (M)
Reinforced and optimized execution (E)
Supports unidirectional axial loads and angular misalignment
REINFORCEDBAINITE HT STABILIZATION OPTIMIZED REINFORCEDBAINITE HT STABILIZATION OPTIMIZED
TKCR type TKV typeFull complement (cageless) design for increased carrying capacities
Supports unidirectional axial loads
Stiff arrangement
Reduced limiting speed compared to caged design
Two-piece machined brass cage (M)
Supports unidirectional axial loads
Stiff arrangement
BAINITE HT STABILIZATION OPTIMIZED PROFILE BAINITE HT STABILIZATION
TKSD typeFull complement cageless design conceived for extremely high axial loads
Special execution for screw-down mechanism
Available with sphered shaft washer and pressure plate
Reduced limiting speed
REINFORCEDBAINITE HT STABILIZATION
Main designs
Double direction thrust bearings
Double direction thrust bearings (DDTBs) are generally composed of two rolling element-cage assemblies, one shaft washer and two housing washers. Being supported by the housing washers, they are able to accommodate very high axial loads acting in both directions, fully axially locating the shaft.
The DDTBs designed by RKB come in a variety of confi gurations, in standard or enhanced execution. Their extremely high load carrying capacities, obtained through the improved internal geometry and the application of special heat treatments, make them an irreplaceable and effi cient solution in many critical applications.
RKB thrust bearings
The thrust bearings (TBs) manufactured by RKB are designed to support high axial loads and, in some cases, even moderate radial loads. The manufacturing program includes single and double direction TBs with fl at or spherical housing locating washers to meet any requirements in various industrial applications. Thanks to the improved internal geometry and the use of the most suitable raw materials, all RKB TBs attain the highest axial load ratings and the best reliability.Depending on application requirements, RKB Bainite Hardening Treatment (HB) and High Temperature Dimensional Stabilization (S) can be applied on bearing rings and rolling elements. The bearing dimensional and running accuracy conforms to ISO/ABMA/GOST specifi cations.
THRUST BEARINGSDOUBLE DIRECTION
WS+GS typeFlat housing washers
Separable components unit: shaft washers (WS) plus housing washers (GS)
Two-piece machined brass cage (M) guided on rollers
Stiff arrangement sensitive to misalignments
Supports very high bidirectional axial loads
52M typeFlat housing washers
One-piece machined brass cage (M) guided on balls
Separable design
Supports medium to high bidirectional axial loads
Suitable for applications requiring both medium to high carrying capacities and good limiting speeds
BAINITE HT STABILIZATION BAINITE HT STABILIZATION OPTIMIZED PROFILE
TTK2 typeLow cross section separable compact units
Two-piece machined brass cage (M) guided on shaft washer
Intermediate washer with external centering on the housing
Preset or adjusted BEP on customer’s request
Stiff arrangement very sensitive to misalignments
Supports very high bidirectional axial loads
TTK1 typeSeparable compact units
Two-piece machined brass cage (M) guided on shaft washer
Intermediate washer with internal centering on shaft
Preset or adjusted BEP on customer’s request
Stiff arrangement very sensitive to misalignments
Supports very high bidirectional axial loads
Available with lubrication grooves and holes in outer spacer
REINFORCEDBAINITE HT STABILIZATION PROFILE REINFORCEDBAINITE HT STABILIZATION PROFILE
Main designs
PRODUCT TABLE
Tapered Roller BearingsO.D. up to 1800 mm
O.D. up to 1925 mm
RA
DIA
LA
XIA
L
TAP
ER
ED
RO
LLE
RS
Single RowTaperedRoller Bearings
Single Row PairedTaperedRoller Bearings
Double RowTaperedRoller Bearings
Multi RowTaperedRoller Bearings
O.D. up to 1925 mm
O.D. up to 1600 mm
Single DirectionTapered RollerThrust Bearings
Double DirectionTapered RollerThrust Bearings
O.D. up to 1600 mm
TQOSAVS2/GTQOS/G TQOSAVS2/G.1
TQITTQO/G.1 2TDONATQO/G spacerlessTQO
TTK2 TTKSPTTK1
TKSDTKVTKCR
TDI.1 TDISSTDO TDONASWTDI TDIS
DFDBTS.1TS
TDONASWE.FF
Cylindrical Roller Bearings
Double RowCylindricalRoller Bearings
Multi RowCylindricalRoller Bearings
Single RowCylindricalRoller Bearings
O.D. up to 1800 mm
O.D. up to 1800 mm
O.D. up to 1400 mm
O.D. up to 1600 mm
Single DirectionCylindrical RollerThrust Bearings
Double DirectionCylindrical RollerThrust Bearings
RA
DIA
LA
XIA
L
CY
LIN
DR
ICA
L R
OLL
ER
S
WS+GS
3NNU3NCF
81M 89M81M+U
SL18SL02 NN.1NNU.1 SL04NJW+NJPW SL01 NNNNU
Q2ACEVOGB2F2CIID2CAF2D
NJ+HJNJ NJGL NPN NUPNJEMP1 NJG NUBNU NCF MUCNJFNU.1
Ball Bearings
Spherical Roller Bearings
O.D. up to 1900 mm
O.D. up to 1580 mm
SphericalRoller Bearings
RA
DIA
LR
AD
IAL
AX
IAL
AX
IAL
BA
LLS
SPH
ER
ICA
L R
OLL
ER
S
Single RowDeep GrooveBall Bearings
Single Row PairedAngular ContactBall Bearings
Double RowAngular ContactBall Bearings
O.D. up to 1925 mm
O.D. up to 1400 mm
O.D. up to 1600 mm
O.D. up to 1400 mm
Single DirectionThrustBall Bearings
Double DirectionThrustBall Bearings
ToroidalRoller Bearings
Spherical RollerThrust Bearings
53M+U51M 52M
DB+ZZ
QJQMTN+ZZZZ 2RSJN1JM
DBTNDFM
EJEMEVOEM
V+2CZVJ
2CZECAMB ECCSCABMA CCCA
DFDB
Other Products
Special and SplitRoller Bearings
O.D. up to 400 mm
O.D. up to 1800 mm
RA
DIA
L
Track and Needle Roller Bearings
SSRB 2-ROW SCRBSCRBLOOSESCRBFIXED
NAJNTRSP NAMNNTRTR
WORROVSX2CZROVSX
AX
IAL
3-ROW ROLLERSCROSSEDL-TYPE SINGLE
Slewing Bearings
Single RowAngular ContactBall Bearings
1. Bearing dimensional and running accuracy according to ISO/AFBMA/GOST standards2. All bearings available in metric and inch sizes, with cylindrical or tapered bore3. Special features available on request
Notes
Via Primo Agosto · 6828 Balerna · SwitzerlandP.O. Box 16 · 6830 Chiasso 3 · SwitzerlandPhone +41 91 260 09 30 · Fax +41 91 260 09 [email protected] · www.rkbbearings.com
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